Commitments and Contingencies (Details) (USD $)	12 Months Ended			10 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Oct. 31, 2011 Petrello	Dec. 31, 2012 Petrello item
Employment contracts
Automatic extension period					1 year
Employment agreement termination without cause, benefit as a ratio to 3 year average base salary and bonus through March 30, 2015					3
Employment agreement termination without cause, benefit as a ratio to 3 year average base salary and bonus after March 30, 2015					2
Employment agreement termination without cause, benefit base period					3 years
Amount of employment agreement benefit payable if terminated without cause					$ 40,800,000
Approximate amount of payment due to death, disability or termination					50,000,000
Employment benefit due to death or disability, payment period					30 days
Minimum rental commitments under non cancellable operating leases
2013	25,609,000
2014	16,001,000
2015	7,646,000
2016	5,307,000
2017	2,986,000
Thereafter	9,527,000
Total	67,076,000
Minimum period of operating lease	30 days
Rental expense relating to operating leases	35,500,000	36,300,000	26,700,000
Minimum volume commitment
2013	67,251,000
2014	65,535,000
2015	63,976,000
2016	47,106,000
2017	27,949,000
Thereafter	67,769,000
Total	339,586,000
Minimum salary and bonus obligations
2013	5,830,000
2014	2,651,000
2015	525,000
Total	9,006,000
Base salary					1,300,000
Annual cash bonus as a percentage of net cash flow				1.50%	2.00%
Threshold percentage of average shareholders' equity set to determine an annual cash bonus					15.00%
Annual cash bonus as a percentage of net cash flow on October 28, 2011					1.50%
Annual cash bonus					17,500,000
Employment agreement quarterly deferred bonus					250,000
Employment agreement amount of group life insurance multiplier of base salary					3
Insurance policy amount					$ 5,000,000
Period after termination date for which benefits, reimbursement of expenses and perquisites will be continued					3 years